minor: Update supported Ansible versions

[SuperQ]

Ansible versions 2.11 and older are not supportable on new platforms. Set the minimum supported Ansible version to 2.12 in order to make updating our integration testing possible.

• Fixup minor linting issues.

[github-actions]

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[SuperQ]

@gardar Fixed up, removing centos-7 here instead of #395 to make some tests pass.

[gardar]

I was hoping centos 7 would be the last version using 2.9 but I don't think we can fully remove the old ansible versions yet, as for example ubuntu 20.04 doesn't have anything newer than 2.9 in the repos, not even in the backports https://packages.ubuntu.com/focal/ansible 😔
I'd much prefer that we add exclusions to the matrix as I mentioned here: #395 (comment)

[SuperQ]

Ok, if you have a hint on how/where you were going to add the version matrix list, I could work on it.

[gardar]

I'm not absolutely certain where it would be best to place the exclusion list, I don't think that it would fit in any of the ansible meta files. So I guess it would either have to be under env: in .github/workflows/ansible-ci.yml on in some new file under .github/

Something like this for example:

env:
  EXCLUSIONS: |
            - target: ubuntu-24.04
              ansible-core-version: 
                - stable-2.10
                - stable-2.11

Then we need to add it to the matrix json that's dynamically generated and used in .github/workflows/ansible-test-molecule.yml

The matrix that's currently generated ends something like this:

jobs:
  ansible-test-integration:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      max-parallel: 4
      matrix:
        target: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
        ansible-core-version: [stable-2.10, stable-2.11, stable-2.12, stable-2.13]

but after adding the excludes it would end something like this:

jobs:
  ansible-test-integration:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      max-parallel: 4
      matrix:
        target: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
        ansible-core-version: [stable-2.10, stable-2.11, stable-2.12, stable-2.13]
        exclude:
          - target: ubuntu-24.04
            ansible-core-version: 
              - stable-2.10
              - stable-2.11

[SuperQ]

Closing in favor of #416.